Leaching-solution-heating system.



F, LAIST.

LBAGHNG SOLUTION HEATING SYSTEM. mPl.ffu^.T ou FILED JUNE 1, 1914L 51 ya@ Patente Nov. 3, MEM.

of course, for the temperature of the ore "that I am not to be restricted to any par? FREDERICK Lius'r, or ANAcoNDn; Montsant* LEACHING-SOLUTON-HEATING SYSTEM. l

specmcatiaa of Letters Patent.' i

` Application and :une 41,1914."isa'riai riti aaza."

' `Patented Nov. 3, 1914'.

T0 all whom it may concern Be it known that I, FREDERICK Lust, a citizen of the United States, residing at' Anaconda, in the county of Deerlodge and State of Montana, have invented certain newl and useful Improvements in Leaching-Solution-Heating Systems, of which the follow'- ing is a full, clear, and exactd'escription, re erence being had t'o 'the accompanying drawings', forming a part hereof. A

vMy .invention has relation' to improve? ments in leaching solution heating. systems; and 1t consists in the novel features and ar-v rangement of parts more full `set forth i'n the specification and pointe out' in the claims.

In the drawings, the 'figure representsl anv elevation of my system, the illustration being more or less diagrammatic in charac.- ter.

The present invention directed to a system of heatin leaching solutions by the heat absorbed y the water circulating through ore coolers traversed by charges .of hot roasted ore on which the leaching solution is intended to operate.

A further object is to maintain the ,teur

perature of the circulating water as well as that of the leaching solution at points where they will be most effective, regard being had charge traversing the cooler. An example of such a cooler will be found in my U. S. Patent Number 1,090,549, dated March 17, 1914, the cooled calcine's discharged therefrom being leachedwith dilute,l sulfuric acidl with or without an adniiXture of' common salt, and then subsequently precipitated by sulfureted hydrogen, the reaction effecting a regeneration of the leaching solution or solvent which is then used on fresh charges of calcine. In the present embodiment of my inventionl avail myself of an ore cooler on the order of that covered by mypatent aforesaid, although yit is to be understood ticular forni or construction of any apparatus entering as an element into the present system.

The advantages of the invention will be best apparent from a detailed description` thereof, which is as follows:

VReferring to the drawing, l, represents an open ended tube or drum rotatable about its axis, on the inside of which are disposed adjacent the walls thereof the circulating 'ing :the 'major water tubes' ltheilatie''r receiving their water supplyfrom a`r cluster of water-distributing pipes 3, radlatin' 'from a common supplyplpe 4j'ir`1' the t of which is interposed a 60 combined glpbox Aand swivel joint B, the pipe being equipped with an ordinary cut-olf valvey V at a point adjacent the watertank: l.fj The drum' l is slightlyfin- @lined to the" hriiohtal, the hot calcines' r being' chargedi'into'the raisedend of the andA the ,cooled c'alcines being dis-.r

charged. fromthe opposite end, the same as thel patnedgcoler aforesaid. To they discharge'and ofthe `circulating pipes 2 are .coupled the `fextension pipes ,l 2 which are dlrectedlrealrwardly or toward the ore-dischargee'lid'of the (a precaution resorted to to avoid' the hot calcinesfrom comi Ving' in contac't with they hotwater' discharged from thejpipes 2),

l and which discharge into anl annular perip'herally slotted Acasing 5 secured to; thefdrilim, thefwater ilowing from said casing"l thrtghy thereof into as tationary troug 6 surround, I portion of the periphery of the drum .and envelo"i the casing 5, the trou'gl'i`-in turn discharging'fthe hot water through a` valve-controlled pipe 7 `int()4 .thev bottom' of'asolution heater 8, .,'Ifheheater 8 the peripheralv slot s A is'comp'osed of terminal heads 9, 9,' connect?,

`ed by circulating tubes 10, the spacesaround the'l't'ubes vbeingy lled '.'wlth the water vdischarged from tre ipe 7 the water after cir-V culatingthrough 't e heater ,escaping by the pipe '11 leading from' the upper portion of thevheater'at apiointi below the upper' head 9L' Thewater from the lll isp'umped by means of a pump P through the .pi e 12 into the' tank. into which likewise discharges fresh waterf. through Y a' rpipe `,13.l from any A'suitable sourcey (notA showl. The l heatedA leaching ,solution vdisxzh'arges through the spout 4,or nozzle lev leading from Athelbottom ,of the' lower ,head'Qinto a solution tank 1),. lfro'rnwhich the lsolution may be circulated ,through thev heater'by a pump P to which the solution isfdelivered through a pipe 15, and from which vitis discharged and circulated'by the lipe 16 tapping the upper head 9 of the hea er. Where the leachinn solution is regenerated as above described, such regenerated portion may be conducted .its proper' sources of su ply (not showii) fthrough af valve-controlled tents vof 'the' solution tank ingabstractcd throii'glia valve-controlledy pipe 1B 'as' sliownl 2, discharging (during the rotation of'the drum 1) t rough the ipes 2 into the casing 5, whence it drops into the trough 6 and from that the hot water iows through the pipe 7 into the heater 8, traversing the latter around the circulating tubes or pipes 10 and escaping through the pipe 11 into the pump P by which it is forced into the tank T through the pipe 12, lthe water thus discharged into the tank receiving accessions of fresh water from the pipe 13. While the head through the piple 16 b hot water is circulating u ward through the solution heater 8, the leac ing solution iows downward through the tubes 10 connecting the heads 9, 9, being delivered to the upper the pump I which draws the leac ing so ution from the solution tank D, the solution being discharged from the heater, through the spout 14 leading from the lower head 9, back into the tank D. In this way the solution is, or

i 1n the tank T and which is used for circulating through the ore-cooler 1, is brought' may be, circulated .as often as desired through the heater 8, such repeated circulation being desirable and in fact necessary where accessions of cold regenerated solution are made to the contents of the tank D from' the pipe 17.

In the o eration *of my system, the temerature o the cooling water or that stored down to approximately' 100 degrees Fahrenheit being maintained at approximately said.

temperature or slightly lower by accessions of fresh water' entering through the pipe 13,l

the fresh water being at substantially 60 degrees Fahrenheit. The hot calcines are fed to the treatment drum or c linderjl at substantially 80 0 degrees Fahrenheit and in their traverse through the drum they are cooled down to about 200 degrees Fahrenheit escaping from the drum at substantially said latter temperature, while the cooling water circulating through the pipes 2 discharges at the ore-intake end of the drum at a temperature in the neighborhood of 190 degrees Fahrenheit, or sllghtly below the boiling point. The water a ter it leaves the heater 8 drops to about 100 degrees temperature so that the heat units it absorbs from the hot calcines in the ore-cooler are practically imparted to the leaching solution v while traversing the heater 8. By controlling the rate of flow of the liquids (by a proper manipulation of the pumps and various valves) and the rate of feed and discharge of the ore or hot calcires, the temperature of the water entering the pipes 2 may be kept practically constant, being caused to surrender to the leaching solution in the heater 8 all the heat units is absorbed while circulating through the ore-cooler 1. In this way the heat of the calcines may be utilized to good advantage.. The temperature of the solution in the leaching tank D may be regulated by the rate of inux of regenerated solution, the rate of abstraction of liquid from the tank, and the size of the tank as quite obvious from the drawings. The cooled calcines are conducted to a suitable leaching tank into which the hot leaching solution from the tank D is conducted through the pipe '18 and the metallic oxids of the calcines are dissolved. The solution is-then drained into a precipitating tank and the copper (and silver) precipitated by any of the methods known to the art, the acid solvent or leaching solution being regenerated.

.Having described my invention, what I claim is f l. In combination with a treatment vessel traversed by a charge of hot material in one direction, means for conducting a circulating cooling medium through the vessel in the opposite direction, a discharge for the heated cooling medium, a source of supply for the cooling medium, a heater located outside Ithe treatment vessel, means for circulating the heated cooling medium through the heater in one direction, means for circulatingthrough the lheater a quantity of leaching solution in a direction opposite to the iiow of the heated cooling medium therethrough, and means coupled to the heater for returning the cooled heating medium after traversing the heater, to its original source of supply. A

2. In combination with a treatment vessel traversed by a charge of hot calcines in a :given direction, means for causing a circulation of a cooling medium through the vessel in the opposite direction, means for discharging the cooled calcines and hot cooling medium atrespectively opposite ends of the vessel, a heater outside the treatment vessel traversed in one direction by a liquid adapted to dissolve the metallic oxids of the calcines, means for circulating the hot cooling medium through the heaterl in the opposite direction and returning the medium incool condition to the treatment vessel aforesaid, and means for regulating the rate of movement of the charge and relative flow of the liquids to maintain any desired temperature therefor. n

3.l In cong'bination with an ore cooler traversed by hot calcines in one direction, means for circulating water therethrough in the opposite direction, the cool calcines and heated water discharging respectively at opposite ends of the cooler, a water tank supplying cool water to the circulating means in the cooler, a heater outside the ore cooler,

means for circulating the heated water discharged from the cooler, through the heater in one direction, a solution tank, means for circulating the solution from the tank through the heater in the o posite direction and returning the same to t e solution tank, means .for returning the cooled water after traversing the heater, to the water tank, and means for controllinglthe rate of flow of the liquids to maintain t e same at any desired temperatures.

4. In combination with an ore cooler traversed simultaneously in opposite directions by hot calcines and cooling water, a heater traversed by a liquid operating as a solvent for the metallic oxids of the calcines,

1 a tank for the 'solvent and means for circulating the hot water discharged from the cooler through the heater for heating the solvent liquid and cooling the water.

5. In combination with an ore `cooler traversed simultaneously in opposite directions by hot calcines and cooling water, a heater traversed by a liquid operating as a solvent for the metallic oXids of the calcines, a tank for the solvent and means for circulating the` hot water discharged from the cooler through the heater concurrently with the traverse of the solventtherethrough, whereby the latter becomes heated and the hot water is correspondingly cooled, and means for returning the cooled water to the' ore cooler.

In testimony whereof I aix my signature, in presence o two witnesses.

FREDERICK LAIST. Witnesses W. H. SHEERIN, H. G. WRIGHT. 

